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Showing results for prime vertical. Search instead for typically vertical.

prime vertical

British  

noun

  1. astronomy the great circle passing through the observer's zenith and meeting the horizon due east and west

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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